<template>
  <div class="list"  ref="wrapper">
      <div>
        <div class="area">
            <div class="tittle border-topbottom">当前城市</div>
            <div class="button-list">
               <div  class="button-wrapper">
                 <div class="button">{{this.currentCity}}</div>
               </div>
            </div>
        </div>
        <div class="area">
            <div class="tittle border-topbottom">热门城市</div>
            <div class="button-list">
                <div  class="button-wrapper"
                      v-for="item of hot"
                      :key ="item.id"
                      @click="handleCityClick(item.name)"
                >
                  <div class="button">{{item.name}}</div>
                </div>
             </div>
        </div>
      <div class="area" v-for="(item,key) of cities" :key="key"
        :ref="key">
           <div class="tittle border-topbottom">{{key}}</div>
           <div class="item-list">
              <div
                class="item border-bottom"
                v-for="innerItem of item"
                :key="innerItem.id"
                @click="handleCityClick(innerItem.name)"
              >
               {{innerItem.name}}
              </div>
           </div>
        </div>
    </div>
  </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
export default {
  name: 'CityList',
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  methods: {
    handleCityClick (city) {
      // this.$store.commit('changeCity', city)
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        // console.log(element)
        this.scroll.scrollToElement(element)
      }
    }
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  }
}
</script>

<style lang="stylus" scoped>
  @import "~styles/varibles.styl"
  .border-topbottom
     &:before
       border-color: #ccc
     &:after
       border-color: #ccc
  .border-bottom
     &:before
      border-color: #ccc
  .list
    overflow: hidden
    position: absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom : 0
   // background: red
    .tittle
      line-height: .44rem
      background: #eee
      padding-left: .2rem
      color:#666
      font-size: .26rem
    .button-list
      overflow: hidden
      padding: .1rem .6rem .1rem .1rem
      .button-wrapper
        float: left
        width: 33.33%
        .button
          margin: .1rem
          padding: .1rem  0
          text-align: center
          border: .02rem solid #ccc
          border-radius: .06rem
    .item-list
      .item
        line-height: .76rem
        padding-left: .2rem
</style>
